AUSSDA - The Austrian Social Science Data Archive (AUSSDA) is a core social science research infrastructure in Austria, offering research data and archiving services. It is located at the Universities of Vienna, Graz, and Linz and is funded by the Austrian Federal Ministry of Science, Research and Economy (BMWFW).
AUSSDA strives to become the leading research infrastructure for the social sciences in Austria, offering high quality, sustainable, and easy-to-use solutions for archiving digital data, along with world-wide access to it. The archive follows international standards in order to make deposited social science data and documentation findable, accessible, interoperable and reusable. AUSSDA is active in a growing network of national and international partners, promoting high archiving standards and contributing to archive solutions of the future.
Our collection covers all social science data. We support the open data movement and work towards maximizing the potential for data use within our user group. The primary beneficiaries of our services are researchers, while our online services can also be used by students, educational institutions as well as media representatives and the public. We stand for integrity in data archiving and promote ethical research principles.

DARIS is a resource centre for research and teaching in the social sciences. It maintains a comprehensive and up-to-date inventory of social science research projects in Switzerland. In addition, our data service makes available a wide range of datasets for secondary analysis.
Databases at DARIS are: FORSbase, COMPASS

NSD is one of the largest archives for research data of its kind and provides data to researchers and students in Norway and abroad. Additionally, NSD is a resource centre, which assists researchers with regard to data gathering, data analysis, and issues of methodology, privacy and research ethics. The main objective is to improve possibilities and working conditions for empirical research that is primarily dependent on the access to data. To fulfil this objective NSD works to reduce financial, technical, legal and administrative barriers between users and data resources.

The Canadian Opinion Research Archive at Queen's University makes available commercial and independent surveys to the academic, research and journalistic communities. Founded in 1992, CORA contains hundreds of surveys including thousands of discrete items collected by major commercial Canadian firms dating back to the 1970s.
CORA is continually adding new surveys and is always soliciting new data from commercial research firms, independent think tanks, research institutes, NGOs, and academic researchers. This website also includes readily accessible results from these surveys, tracking Canadian opinion over time on frequently asked survey questions, as well as tabular results from recent Canadian surveys, and more general information on polling. This material is made available as a public service by CORA and its partners.

The CDHA assists researchers to create, document, and distribute public use microdata on health and aging for secondary analysis. Major research themes include: midlife development and aging; economics of population aging; inequalities in health and aging; international comparative studies of health and aging; and the investigation of linkages between social-demographic and biomedical research in population aging. The CDHA is one of fourteen demography centers on aging sponsored by the National Institute on Aging.

So.Da.Net network, following the Social Data Bank (SDB) of the National Centre for Social Research (EKKE) that pre-existed, in a time frame of five years has been linked and closely collaborated with the european data archives. EKKE through SDB has participated to the European Consortium of Social Science Data Archives (CESSDA ERIC) since 2000. The national research network Sodanet_GR has been formed in 2012 and is consisted of the following 7 organisations:
1) National Centre for Social Research (EKKE) – Social Data Bank
2) University of the Aegean – Department of Sociology
3) National & Kapodistrian University of Athens – Department of Political Science & Public Administration
4) Panteion University – Department of Political Science & History
5) University of Peloponnese – Department of Social & Educational Policy
6) Democritus University of Trace – Department of Social Administration & Political Science
7) University of Crete – Department of Sociology .
The So.Da.Net network is the Greek research infrastructure for the social sciences.
So.Da.Net supports multidisciplinary research and promotes the acquisition, exchange, processing as well as dissemination of data deriving from and related to social science research.

BADGIR is an on-line data archive at the University of Wisconsin - Madison. From this portal you can browse or search data documentation (e.g., metadata, codebooks) and univariate summary statistics (e.g., mean, frequency counts). The database contains documented survey results from various survey-research projects in the US, Central America, and South America. Some historical datasets also (e.g. of slave-trade records).

FORSbase is an online platform that enables you to access data and obtain information about social science studies in Switzerland. You can register your own research projects, as well as store and share your own data.

DataFirst is a research unit at the University of Cape Town engaged in promoting the long term preservation and reuse of data from African Socioeconomic surveys and provides a secure setting for improved access to national census and survey microdata for research purposes.

The General Social Survey (GSS) conducts basic scientific research on the structure and development of American society with a data-collection program designed to both monitor societal change within the United States and to compare the United States to other nations.

SND is a service organisation for Swedish research within the humanities, social sciences and health sciences. SND helps enable Swedish and international researchers gain access to existing data within and outside of Sweden. SND provides support and guidance to researchers throughout the whole research process. SND is the Swedish node in an international network of data archives. This network is an important part of the research infrastructure.

<odesi> is a digital repository for social science data, including polling data. Data collections are: Statistics Canada, Canadian Gallup Polls, CORA - Canadian Opinion Research Archive, ICPSR - Interuniversity Consortium for Political and Social Research.

Unidata – Bicocca Data Archive is an interdepartmental center of the University of Milan-Bicocca, born in 2015. The center is the Italian point of reference for the research data archiving and dissemination, based on the example of the National Archives located in major European countries and beyond.
UniData inherits the long work from the ADPSS-Sociodata Data Archive, born in 1999 in the Department of Sociology and Social Research at the same University.
Here you can find only individual data from 2010.
For older surveys please visit ADPSS Sociodata, Data Archive for Social Sciences - Archivio Dati e Programmi Per le Scienze Soziali: http://www.unidata.unimib.it/old/ and
ADPSS-SOCIODATA Archivio Dati e Programmi per le Scienze Sociali Dataverse : https://dataverse.harvard.edu/dataverse/adpss

The European Election and Referendum Database is specifically intended to provide election results on a regional level for European countries. The archive cover the period from 1990 until present and publishes results from parliamentary elections, European Parliament elections, presidential elections, as well as EU-related referendums for a total of 35 European countries.